Gas heating-stove.



No. 70!,l00. Patented May 27, I902.

S. STEWART.

GAS HEATING STOVE.

(Application filed May 16, 1901.)

(No Model.)

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UNrnD STATES PATENT OFFICE.

SAMUEL STEIVART, OF NEWARK, NEW JERSEY.

GAS HEATING-STOVE.

SPECIFICATION forming part of Letters Patent'No. 701 100, dated May 27, 1902.

Application filed May 16,1901. $erial No. 60,436. (No model.)

To allwhom it may concern: 7 l

Be it known that I, SAMUEL STEWART, a citizen of the United States, residing at 37:} Emmett street, Newark, county of Essex, State of New Jersey, have invented certain 'new and useful Improvements in Gas Heating-Stoves, fully described and represented in the following specificationand the accompanying drawings, forming a part of the same.

One object of the present invention is to furnish a gas heating appliance with fines or passages in contact with heated surfaces and in connection with the external atmosphere, whereby fresh air maybe drawn into the apartmentin which the stove is used and such air carried over the flame and fuel to mingle with the'products of combustion and absorb the heat therefrom before its entrance to the apartment. The fresh air is heated before it is mingled with the products of combustion, and the latter are thereby diluted without chilling them, so that they may be discharged into the apartment without producing any offensive odor or greatly contaminating the atmosphere. The construction I employ also furnishes the burners with air drawn fromv the external atmosphere, so that none of the air of an apartment may be consum ed to feed the combustion.

Another object is to arrange'a bed of terracotta in fragments resembling coal in size and shape upon a grate directly over the open mouths of gas-burners which are suppliedwith gas and air independently, whereby perfect combustion is secured irrespective of the air above the grate, so as to produce a high temperature below the grate, and thus maintain the incandescence of the fragments. Such a bed of incandescent material not only discharges'a great deal of radiant heat; but in an open grate, such as is used for hardcoal fires, it adds a great deal of cheerfulness to the apartment which it warms.

These objects are, attained by inclosing the desired number of suitable burners within a stove-casing, supporting a grate above the same, connecting the bottom of the casing by an air-pipe with the external atmosphere, and providing fines within the casing through which the air may pass adjacent to the bed of heated material and be discharged over such bed into the apartment mingled with the products of combustion. -A series of burners is used in preference to one, so thatv each one may have a mixing-chamber of suita perforated screen at the point of ignition.

The grate is arranged close to the tops of the burners to support the incandescent material,and the flames are thus projected through such materialand operate to heat the same in the most perfect manner.

The invention will be understood by reference to the annexed drawings, in which- Figure 1 is a perspective View of a heater embodying my improvement. Fig. 2 is a 10ngitudinal vertical section, and Fig. 3 a transverse vertical section, of the same, each taken through the center of the burners. Fig. 4 is asection on line 4 4 in Fig. 3, and Fig. 5 a section on line 5 5 in Fig. 3 with the parts below the section-plane.

a designates the sides of the stove-casing or body, and a the back.

Z) designates the bottom of the casing, and c the top.

d designates the grate within the casing, and d the bed of terra-cotta fragments imitating coal upon the grate.

A large opening 6 is provided in the front of the casing for the radiation of heat from the bed,'the whole casing thus presenting the ordinary appearance of an open coal-stove or so-called-Franklin stove;

An air-box h is fitted beneath the bottom I) offthe casing, and vertical partitions f are arranged to form vertical flues f" within the back and sides of the casing, and all of such fines are connected with the air-box h by apertures through the bottom I) of the casing. The partitions are formed with flueopenings 0 just below the top of the casing, and arrows indicate the passage of the fresh air through such openings and its escape from the front of the casing by the opening e. Holes form the flue-openings in the side partitions, while the opening 0 is formed over the whole of the rear partition. Cylindrical or tuas my invention furnishes an ample supply The gas is supplied to each burner by a pipe 0, extended through the burner tube and serving to support the same upon the bottom b of the casing. A single jet-aperture in the top of the tube supplies the gas to the burner, and the several gas-pipes are connected by cockswith a supply-pipe p in the usual manner. The cylinders of the burnersg are fitted. to holes in the bottom I) and extend but slightly into the air-box h, but are carried up sufliciently close to the grate to project the flame with the best effect upon the fragments 61'. Byusing a series of separate burners g and mixing the gas and air in each before ignition I produce a much more perfect combustion and a highertemperature than where mere jets of gas are projected upon the terracotta and combustion secured with the surrounding atmosphere. An air-pipe't'extends from the air-box h to connect the same with the external atmosphere, and the fresh air is thus introduced to the burners and to the fines f. The several partitions f surround the bed of incandescent material d and are heated by contact therewith, and the air is thus heated which enters such flues.

By discharging the air from the fiues within the top of the stove it is highly heated by passage over the incandescentbed before it reaches the opening 8 to escape; but it is discharged into the apartment with all its original proportion of oxygen, as the gas from the burners is fully supplied with air independently.

It will be seen from the above description that the air-box furnishes separate currents of air to the burners and to the heating-fines within the stove-casing, so that the air which enters such flues is uncontaminated by mixture with the gas which is supplied to the burners. In fact, the air which enters the flues and from them reaches the apartment contains all of its original ingredients substantially unchanged, and thus operates to ventilate the room as well as to warm the same.

The air escaping from the flues through the openings 0 passes through the upper part of the casing over the incandescent bed to escape from the front opening 6, but does not require to assist in the combustion of the gas,

of air to the gas-burners, so that perfect combustion can be secured by properly regulating the gas-cocks. In the heater or stove shown in the drawings no provisionis made for conducting the products of combustion from the apartment in which the stove is used, as especial provision is made for securing perfect combustion of the fuel-gas, and ample provision is made for ventilating the apartment by discharging into it a volume of air from the external atmosphere.

The fragments of terra-cotta or other incombustibles piled upon the grate become speedily darkened by the products of combustion, and the incandescent bed resembles latter is heated by a flame which is generated below the bed.

With such construction perfect combustion is secured, and none of the fuel-gas is discharged into the apartment.

Havingthus set forth the nature of the invention, what is claimed herein is 1. In a gas-heater having a series of upright tubular burners, the combination, with the casing having sides, back, top and bottom, and front provided with opening 6 as set forth, and air-chamber h extended under the bottom, of the horizontal grate d supporting a bed of terra-cotta fragments as set forth, the series of upright tubular burners having each the cylindrical body g'extended through the bottom of the casing and projected upwardly nearly to the grate, and a gas-pipe 0 extended through each cylindrical body to support the burner, and provided with gasjet as set forth, and each burner having the flame-screen g upon the top and the perforated shell upon the bottom extending downwardly into the air-chamber, whereby the gas and air are mixed in the several burners, and a series of flames are applied to the under side of the grate to render its contents incandescent, substantially as herein set tom, of the horizontal grate 61 supporting a bed of terra-cotta fragments as set forth, the series of upright tubular burners having each the cylindrical body 9 extended through the bottom of the casin g, and projected upwardly nearly to the grate, a gas-pipe 0 extended through each cylindrical body to support the burner and provided with gas-jet as set forth, and each burner having the flame-screen 9 upon the top and the perforated shell 9 upon the bottom extending downwardlyinto the airchamber, and a partition extended upwardly in contact with the grate inside the casing, forming the air-flue f having connection with the air-box h, and having flue-openings a into the space above the grate, to supply the apartment with heated air independently with the products of combustion.

3. In a gas-heater having a series of upright tubular burners, the combination, with the casing having sides a, back a, bottom 12, top 0, and air-chamber hextending under the bottom, with partition f extended upward from the bottom, forming an air-flue f to connect the chamber h with the interior of the casing below the top a, a horizontal grate within the casing supported upon the partition and upon the front of the casing, the latter having the opening 6 as set forth, and the series of tubular burners 9 having their lower ends projected through the bottom I) and provided each with perforated shell 9 and their upper ends provided with flame-screens g in proximity to the grate, and eachburner having the gaspipe 0 extended within the same and supplied with gas-jet, the whole arranged and operated substantially as herein set forth.

4:. A gas-heater comprising the casing closed upon the top and three sides and containing the grate with a bed of terra-cotta fragments thereon and an opening before the grate for the radiation of heat, partitions within the rear and sides of the casing forming flues opening into the top of the casing, burners beneath the grate, an air box and pipe connecting such burners and flue with the external atmosphere, and the bed of terra-cotta being in contact at its edges with the partitions to heat the same and the air within the fines. i

5. In a gas-heater, the combination, with a casing containing a grate and a bed of terracotta fragments thereon, and having an opening before the grate for the radiation of heat, of a tubular burner or burners extended from the bottom of the casing upward nearly to the grate with gas-supply in the bottom of such burner, a flame-screen at the top of the burner next the grate, an air-box below the casing with air-supply thereto,and a perforated shell extended from the burner into the air-box to receive the air therefrom.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

SAMUEL STEWART.

Witnesses:

GEORGE W. DUNN, THOMAS S. CRANE. 

